31221330010 has 32 divisors (see below), whose sum is σ = 62157069072. Its totient is φ = 11216309760.

The previous prime is 31221330001. The next prime is 31221330031. The reversal of 31221330010 is 1003312213.

It can be written as a sum of positive squares in 8 ways, for example, as 4459969089 + 26761360921 = 66783^2 + 163589^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3240651 + ... + 3250270.

Almost surely, 2^31221330010 is an apocalyptic number.

31221330010 is a deficient number, since it is larger than the sum of its proper divisors (30935739062).

31221330010 is a wasteful number, since it uses less digits than its factorization.

31221330010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6490978.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31221330010 its reverse (1003312213), we get a palindrome (32224642223).

The spelling of 31221330010 in words is "thirty-one billion, two hundred twenty-one million, three hundred thirty thousand, ten".